Rare-earth doped boron nitride nanotubes

Computation of the infrared active modes in single-walled boron nitride nanotube bundles

“…To illustrate the symmetry dependence of the IR spectrum with chirality, the calculated ZZ (dashed lines) and XX (solid lines) IR spectra of bundles for five values of the chiral angle θ (0 • , 10 • , 15 • , 20 • , and 30 • ), associated with (17, 0), (15,4), (14,5), (13,7), and (10, 10) nanotubes, respectively, are displayed in figure 3: (1) in the low-wavenumber region (figure 3: left), weak modes depending on chirality are observed. In the XX spectrum (solid lines), two modes at 88 and 213 cm −1 are calculated for the (15, 4), (14,5), (13,7), and (17, 0) tube bundles, and a single mode, at 210 cm −1 , is expected for the (10, 10) armchair tube bundle.…”

“…The stability of BNNTs was firstly studied on the basis of semi-experimental tight binding [1] and local density approximated density functional theory [3] calculations in 1994 and their synthesis was realized in 1995 with the arc-charging method using the BN electrode packed into a metal casing [6,7]. Other preparation methods have been developed subsequently, such as arc-melting [8], hightemperature chemical reaction [9][10][11][12][13], ball-milling [5,14,15], chemical vapor deposition [9][10][11][12], and laser ablating [16,17]. Recently, Guo et al [18] reported interesting results from the synthesis of BNNTs, which either appear in bundles with a width close to 50-70 nm or as a single tube with a diameter around 5-20 nm.…”

A Facile Strategy for the Functionalization of Boron Nitride Nanotubes with Pd Nanoparticles

“…Yet it is difficult to directly decorate the BNNTs with metal nanoparticles by chemical route due to the good chemical inertness of the BNNTs. At present, the synthesis of metal nanoparticles decorated BNNTs is mainly realized by physical vapour deposition (PVD) [13] or a complicated chemical route [16]. Although metal nanoparticles with uniform size can be obtained by PVD, the deposition only occurs on the top surface of bulk BNNTs samples facing the metal target.…”

The Effect of Sucrose on Adsorption Properties of Hexagonal Boron Nitride Powders

“…Boron nitride(BN) is a kind of non-oxide inorganic ceramic materials, the crystal structure and performance of BN is similar to the graphite carbon [1][2].BN includs five isomers(h-BN, r-BN, c-BN, w-BN, o-BN), among them, h-BN, which is analogous to graphite in its layered structure, as its surface color is white, it is also named the white graphite [3]. h-BN possesses many excellent properties, such as high-temperature resistance, corrosion resistance, good thermal stability, good lubricity, low density, high heat conductivity and low permittivity, etc [4][5][6]. And the hydrophobicity performance of BN can prevent the moisture in the air condensed on the surface of the powders [7].BN is indissoluble in cold water, after boiling for a long time will slowly break down into ammonia and boric acid [8].…”